Science News - The Hindu

Centers for Disease Control and Prevention. File

CDC says revised guidance on coronavirus spread posted in error, removes it

The guidance now states that “droplets can land on the mouths or noses of people nearby or possibly inhaled into the lungs”.

The updated guidance by CDC on September 18 says that the virus most commonly spreads through “respiratory droplets or small particles, such as those in aerosols, produced when an infected person coughs, sneezes, sings, talks, or breathes”. Representational image.

CDC acknowledges aerosols as ‘main way’ of coronavirus spread

Word of caution: Care is needed when compiling policies relying on long-term immunity, either through natural infection or vaccinatio, aimed at attaining herd immunity.

Protection against SARS-CoV-2 may be short-lived

R. Prasad Since reinfection can occur, the only safe and effective way to achieve herd immunity may be through vaccination

Evidence: Hypothalamic temperature remained high despite 12 hours of recovery sleep.

Lack of sleep can affect body, brain

Aswathi Pacha Temperatures of cortical and hypothalamus regions rose in sleep-deprived rats

Editor's Pick

Immune cells: SARS-CoV-2-specific T cells are only now being characterised from COVID-19 patients.

SARS-CoV-2-specific T cell immunity prevents recurrent severe COVID-19 disease

R. Prasad Study shows previously unanticipated degree of population-level immunity against COVID-19

Strategy wise: Countries implementing national social distancing policy showed greater reductions in transmision compared to those with regional policies.

Study finds physical distancing linked to drop in coronavirus spread

PTI Over two weeks, 46 countries prevented an estimated 1.57 million cases

Wild animals in urban clusters

D. Balasubramanian

The COVID-19 effect

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Watch | Kamikatsu: The zero-waste town in Japan

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CDC says revised guidance on coronavirus spread posted in error, removes it

CDC acknowledges aerosols as ‘main way’ of coronavirus spread

Coronavirus | ICMR completes second sero-survey

The Hindu Explains | What does the detected presence of phosphine on Venus mean?

Question corner | Is the Moon rusting?

Tracking cases through sewage analysis

Protection against SARS-CoV-2 may be short-lived

Since reinfection can occur, the only safe and effective way to achieve herd immunity may be through vaccination

Another look at groundbreaking inventions in ICT

From Internet to Deep Learning, the book looks at life-altering inventions

Lack of sleep can affect body, brain

Temperatures of cortical and hypothalamus regions rose in sleep-deprived rats

Detecting fake Scotch Whisky, without opening the bottle

Scotch whisky can be very expensive. While testing for suspected fraud or adulteration of such pricey drinks, contactless sensing without opening the bottles would be preferable.

Scientists use Indian Ocean earthquake data to tell how fast it is warming

By one estimate, the scientists said the ocean could be warming by nearly 70% greater than had been believed.

Watch | Kamikatsu: The zero-waste town in Japan

A video on Kamikatsu, Japan’s first zero-waste municipality

Watch | Scientists discover possible sign of life on Venus

A video on the recent discovery of the presence of phosphine gas in the atmosphere of Venus

Catch this virtual space exhibition

The virtual exhibition ‘ISRO & CNES: A Common History’ presents glimpses of collaboration between India and France in the 1960s and 70s

Potential sign of alien life detected on inhospitable Venus

The researchers did not discover actual life forms, but noted that on Earth phosphine is produced by bacteria thriving in oxygen-starved environments

Science behind air-breathing scramjet engine

This indigenous engine is the centrepiece of the cruise vehicle flown by DRDO

Low-cost device for deep vein thrombosis

It replicates the normal movement of the muscles to keep the blood flowing

Question Corner | How do shaving blades become dull after repeated use?

Readers may send their questions to questioncorner@thehindu.co.in

Can universal masking be a crude ‘vaccine’?

Masks decrease risk of infection and if infected decrease the amount of viral particles, leading to only asymptomatic infection or mild disease

A keen look at groundbreaking inventions in ICT

Many of these inventions in information and communication technology have occurred in the last 55 years

Story of an asteroid that hit Rajasthan millions of years ago

The resultant craters of such impacts could be sources of hydrocarbon and mineral deposits

Coronavirus | Serum Institute pauses COVID-19 vaccine trials

COVID-19 vaccine trials were stopped globally after a recipient in U.K. showed adverse symptoms

U.S. spacecraft named after late Indian-American astronaut Kalpana Chawla

“Chawla was selected in honour of her prominent place in history as the first woman of Indian descent to go to space,” it said.

Coronavirus: Plasma therapy not beneficial in reducing mortality, shows ICMR study

According to the study, only two randomised controlled trials on convalescent plasma use in COVID-19 have been published, one from China and the other from the Netherlands.

Coronavirus | Scientists alert The Lancet to ‘potential data inconsistencies’ in Russian vaccine trial paper

Questions on the integrity of published data raised in open letter

SpaceX says Starlink internet private beta testing speeds are over 100 Mbps

SpaceX says Starlink can provide high speed, low latency internet in remote areas where connectivity is limited or completely unavailable, including on aeroplanes and ships.

Moon may be rusting along poles, suggest images sent by Chandrayaan-1

Presence of water and oxygen, which the moon is not known to have, is needed to interact with iron to create rust

Electronic skin can sense touch, pain just like human skin

The researchers say that the device is capable of mimicking body’s quick response to things, and can react to painful sensations with the same lighting speed that nerve signals travel to the brain.

Smoking tied to COVID-19 risk

Smoking appears to increase the genetic contribution to COVID-19 infections, a small study suggests. The novel coronavirus enters the body by

Inhaling polluted air can lead to brain damage

Mice exposed to dirty air formed amyloid deposits and tangles in the brains

Question Corner | Do many small birds have big brains?

Many small birds have been noted to have larger relative brain sizes. This help them survive harsh seasonal changes and unpredictable habitats.Using

No correlation between Ct values and COVID-19 severity

Cycle threshold values can depend on how the sample was collected and even the technical competence of the person performing the test

A single person spreads coronavirus to 23 others in a bus ride

Unlock 4 guidelines, by allowing metrorail service, may worsen risk of infections

How African Sahara amplified a drought in Asia

Mineral deposits of caves in Vietnam, point to the end of the Green Sahara

Watch | Is COVID-19 intensifying in rural India?

A video explainer on how rural India is affected as India's COVID-19 cases cross the 4 million marks

Tiny robots that can be controlled by laser light

The robot's circuit is made with silicon solar cell for its body and head, and electrochemical actuators are attached to function as legs. When laser light is flashed on the cells while switching the laser back and forth between the front and back cells, the robot walks.

RT-PCR test kit of Pune firm gets nod for manufacture, sale in India

‘CoViDx One’, a RT-PCR test kit, has received approval from the CDSCO

“It is a whole new world”: scientists detect mysterious black hole

GW190521 weighs in at 142 times the mass of our Sun and is the first “intermediate mass” black hole ever observed.

CSIR labs vary widely in earnings: RTI

Some labs of the Council of Scientific and Industrial Research (CSIR) -India’s premier laboratory research network, have earned no money from

Coronavirus | Preparations on for second phase of human clinical trial of COVID-19 vaccine

The IMS and SUM Hospital is one of the 12 medical centres in the country chosen by the ICMR for conducting the human trial of the vaccine developed by Bharat Biotech

India, France in discussion for Mission Alpha-like equipment for Gaganyaan astronauts

Space agencies of the two countries are also collaborating on nearly ₹10,000 crore Gaganyaan mission that aims to send three Indians to space by 2022

Watch | COVID-19 and children

A video explainer on how SARS-CoV-2 directly and indirectly impacts children around the world

Lessons from the changing Antarctic Ocean floor

Using seismic profile data from across 40 years and over 150 expeditions, the team reconstructed the past

The use and re-use of N95 masks

A collaboration of Mumbai-based organisations has spawned a workable solution

Flying high against all odds

How do birds migrate in unfavourable winds?Bird migration has always fascinated scientists, and the behaviour of billions of migratory birds has been

Pre-existing memory T cells may only reduce COVID-19 severity, do not prevent infection

The immune cells may mount a faster and stronger response upon exposure to the SARS-CoV-2 virus

Second case of confirmed coronavirus reinfection reported

The second infection led to severe symptoms, including hypoxia, breathlessness

Acronyms and abbreviations in scientific publications

When writing papers, using multiple acronyms can hinder understanding

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The updated guidance by CDC on September 18 says that the virus most commonly spreads through “respiratory droplets or small particles, such as those in aerosols, produced when an infected person coughs, sneezes, sings, talks, or breathes”. Representational image.

53K | CDC acknowledges aerosols as ‘main way’ of coronavirus spread

President Ram Nath Kovind inaugurates the Visitor’s Conference on Implementation of National Education Policy 2020 on September 19, 2020. Photo: Twitter/@EduMinOfIndia

19K | National Education Policy 2020 | New curriculum, assessment system to roll out from academic year 2021-22

A transmission electron micrograph of SARS-CoV-2 virus particles. Photo: National Institute of Allergy and Infectious Diseases via AFP

17K | The Hindu Explains | What are the long-term effects of COVID-19?

The Lok Sabha on September 20, 2020.

15K | Parliament proceedings | September 20, 2020

15K | Explainer | Why are the Agriculture Bills being opposed

Construction workers on a building site in Dubai, 2006

12K | Indian migrant workers in Gulf countries are returning home without months of salary owed to them

Rajeev Sharma, who has been arrested by the Delhi Police in connection with a case under the Official Secrets Act. Photo: Delhi Police via PTI

12K | Arrested Delhi journalist Rajeev Sharma was passing info to the Chinese

BJD's Bhartruhari Mahtab speaks on the Epidemic Diseases (Amendment) Bill, 2020.

11K | Parliament proceedings | September 21, 2020

TMC MP Derek O'Brien attempts to tear the rule book as ruckus erupts in the Rajya Sabha over agriculture-related bills, during the ongoing monsoon session of Parliament, in New Delhi on September 20, 2020. Photo: RSTV/PTI

11K | Parliament proceedings | 12 Opposition parties give notice of no-confidence against Harivansh